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9-5. AUTO VANE OPERATION
1. Horizontal vane
(1) Vane motor drive
These models are equipped with a stepping motor for the horizontal vane. The rotating direction, speed, and angle of
the motor are controlled by pulse signals (approximately 12 V) transmitted from indoor microprocessor.
(2) The horizontal vane angle and mode change as follows by pressing VANE CONTROL button.
(3) Positioning
To confirm the standard position, the vane moves until it touches the vane stopper. Then the vane is set to the
selected angle.
Confirming of standard position is performed in the following cases:
(a) When the operation starts or finishes (including timer operation).
(b) When the test run starts.
(4) VANE AUTO ( ) mode
In VANE AUTO mode, the microprocessor automatically determines the vane angle to make the optimum room tem-
perature distribution.
AUTO
→
1
→
2
→
3
→
4
→
5
→
SWING
Horizontal
position
In COOL and DRY operation
Vane angle is fixed to Horizontal position.
(5) STOP (operation OFF) and ON TIMER standby
In the following cases, the horizontal vane returns to the closed position.
(a) When STOP/OPERATE (OFF/ON) button is pressed (POWER OFF).
(b) When the operation is stopped by the emergency operation.
(c) When ON TIMER is ON standby.
(6) Dew prevention
During COOL or DRY operation with the vane angle at Angle 4 or 5 when the compressor cumulative operation time
exceeds 1 hour, the vane angle automatically changes to Angle 3 for dew prevention.
(7) SWING ( ) mode
By selecting SWING mode with VANE CONTROL button, the horizontal vane swings vertically.
(8) POWERFUL COOL (
) mode
When POWERFUL COOL button is pressed in COOL mode, the fan speed and the set temperature are automati-
cally adjusted.
Operation becomes POWERFUL COOL mode.
POWERFUL COOL mode is automatically released 15 minutes after operation starts, and the operation mode
returns to the mode prior to POWERFUL COOL operation.
POWERFUL COOL mode is also cancelled when POWERFUL COOL button is pressed once again, OPERATE/
STOP (ON/OFF) button is pressed, FAN SPEED CONTROL button is pressed, ECONO COOL button is pressed or
change to other operation mode.
NOTE1
: The temperature buttons are not available during POWERFUL COOL operation.
2
: VANE CONTROL button is available.
(9) ECONO COOL ( ) operation (ECONOmical operation)
When ECONO COOL button is pressed in COOL mode, set temperature is automatically set 2°C higher by the
microprocessor.
Also the horizontal vane swings in various cycles.
SWING operation makes you feel cooler than set temperature. So, even though the set temperature is higher, the air
conditioner can keep comfort. As a result, energy can be saved.
To cancel this operation, select a different mode or press one of the following buttons in ECONO COOL operation:
ECONO COOL, VANE CONTROL or POWERFUL COOL button.
OBH779C